Taper attachment construction



Jan. 26 1943. c. A. BICKEL I 2,309,298

TAPER ATTACHMENT CONSTRUCTION Filed June 10, 1940 5 Sheets-Sheet 1 Mil M701? [ll/FORD 4. BIC/(EL ATTORNEYS r a taper cutting device, having Patented 1... 2c, .1943.

zsoazos TAPER ATTACHMENT CONSTRUCTION Cliii'ord A. Bickel,

Monarch llaehin poration of Ohio Sidney, Ohio, assignor to The e Tool 00., Sidney, Ohio, a cor- Application June 10, 1940, Serial No. 339,686 V 2 Claims. (case-17) This invention relates to taper cutting devices for use in combination with a lathe or other turning machine.

An object or the invention is to provide a taper cutting device wherein a movable slide member is positioned upon a plurality of roller bearings to reduce the friction oi the movement between the slide and carriage bracket upon which the slideismounted.

A further object of the invention is to provide a continuous chain of roller bearings and to position the chains between'the slide and carriage bracket of a taper cutting device.

Another object of the invention is to provide means to'longitudinally guide a plurality of lineally interconnected roller bearings.

Another object oi the invention is to provide a taper cutting device wherein the slide is supported upon a plurality of lineally interconnected roller bearing elements which absorb vertical thrust or the slide with respect to a carriage bracket upon which the slide is mounted, and

vwherein a plurality or roller bearing elements are positioned between the slide and carriage bracket in such a manner as. to absorb transverse thrust of the slide.

Another object .01 the invention isto provide a combination of roller bearings and ball bearings within a taper cutting device in such a manner that the roller bearings absorb vertical carriage bracket which is adaptedto be secured to the can'lage positioned upon the lathe or turning machine. This carriage bracket is moved longitudinally to and fro along the ways of the lathe when the carriage of th lathe is operated. A slide member is positioned upon the carriage bracket, upon suitable anti-friction bearing d6? vices, and is adapted to be retainedin' a stationaryposition witlrrespect td the bed of a lathe by means of a suitable anchoring device. A swivel member i pivotally mounted upon the slide and is arranged to be positioned at an angle with respect to the axis of rotation of the workthrusts while the ball. bearings absorb lateral thrusts.

Further objects and advantages will be apparent iron: the drawings and the description which follows.

In the drawings: Figure 1 is a plan view of a'lathe upon which invention, isattached;

Figur 2 is a cross-sectional view of the taper cutting device taken alongline 2-2 oi. Figure 1;

features of this piece in the lathe. A shoe engages the swivel member and is carried by suitable means upon the carriage bracket and is moved longitudinally with respect to the swivel member when the carriage bracket is moved longitudinally with the carriage of the lathe. The shoe is interconnected with the cross-feed screw or the cross-slide of the lathe in such a manner that the angular movementoi the shoe, with respect to the axis of rotation of the workpiece in the lathe, will be transmitted to the cross-feed screw and crossslide simultaneously with longitudinal movement of the carriage oi the lathe, thereby cutting a taper on a workpiece positioned in the lathe. To

III there is mounted a head stock II Within which there is provided the usual and conventional driving means for rotating a live spindle I5. At the opposite end ofthe lathe there is provided a tail stock I6 which is mounted upon the ways I3 to permit longitudinal movement of the tail stock I to and fro. along the ways. The tail stock I8 carries a'dead center H which is adapted to be clamped into position in any conventional manner as by the hand lever I8. A hand lever (not shown) is also, provided to cause the I tail stock Ii to be clamped into position upon piece within a lathe. The device consist of a 5 the ways II. A carriage 20 is positioned upon the lathe bed I2 and is adapted to be mounted upon the ways Ila to permit longitudinal movement of the carriage 20 to and fro along the ways I In by suitable drive mechanism. An apron II depends from the carriage '20 along the front cross-feed screw 28.

cate the movement of the tool rest,

portion of the lathe'lil and is adapted to have mounted thereupon suitable controls for controlling the operation of the carriage 28 and the These controls may consist of a hand wheel 22 which engages a feed rack (not shown) to cause movement of the carriage 28 to and freedom the ways "a. A hand wheel 28 may be provided for controlling the operation of the cross-feed screw 25, which screw can also be driven from a feed rod (not shown). A suitable micrometer head 24 may be positioned upon the controlling device for the cross-feed screw 25 to indicate the movement thereof.

' rotation of the cross-feed screw 28 is permitted.

A cross-slide 2c is mounted upon the carriage 28 and is directed in its transverse movement upon the carriage 28 by means of the ways 22a. A conventional typedovetail Joint is provided between the cross-slide 26 and the ways- 22a. Mounted upon the crossslide 28 there is a compound toolrest 21 which consists of a turntable 28 and a tool post 28. A- suitable clamping device 38 is mounted upon the tool post 28 and is arranged to secure a working tool within the post 28 as well as to secure the post 28 to the turntable 28, thereby rigidly securing a tool upon the compound tool rest 21. A micrometer indicating head 8| may be arranged upon the compound tool rest 21 to control and indi- The taper cutting device of 'this invention consists of a carriage bracket 85 which is secured to the carriage 28 by means of the bolts 36, whereby movement of the carriage 28 will cause the carriage bracket 85 to be moved therewith. A slide member 48 is positioned upon the carriage bracket 85 and is supported thereon by means of suitable anti-friction bearing devices hereinafter described. An anchor rod 4| is secured to one end of the slide 48 and extends through an anchor bracket 42. The anchor rod 4| is securely positioned within the anchor bracket 42 by the threaded nuts 43 which engage opposite sides of an extending arm of the anchor bracket 42.- The anchor bracket 42 is secured to the way |3a by means of the binding nut 44 which engages a suitableclamp for securing the anchor bracket to the way I80. A

swivel 58 is pivotally mounted upon the slide 40 by meansof a pin 5|, see Figure 2, in such a, manner that the swivel 58 may be positioned I at an angle with respect to the axis of rotation of a workpiece positioned between the live cen-.

ter l5 and the dead center I! of the lathe l8. One end of the swivel 58 is provided with a gear segment 52 which engages a .micrometer adjusting device 53,. operationof which controls the angular position of the swivel 58. Binding screws 54 extend through the swivel 58 into engagement with the slots 58 positioned in the slide 40 and cooperatetherewith to secure the swivel 58 in its angular posltion'upon the slide 48 after having been set by means of the micrometer adjusting device 53.

'A shoe or follower 68 engages the swivel 58 and is guided in its longitudinal path of travel along the swivel 58 by means of a guide rail 8|. Theshoeill carries a stud which ex-, tends upwardly through a bushing 88 in the draw-bar 84. A washer is positioned upon the stud 6,2-above the draw-bar 64 and is adapted to be caused'to engage the bushing 68 by means of a nut 68 threaded upon the end of the stud 62. The stud 82 and the bushing 88 provide the means for pivotally mounting the draw-bar G4 upon the shoe 88 to permit trans verse motion of the shoe 88 to be transmi through the draw-bar 84 when the shoe travels V an angular longitudinal path along the guideway 6| of the swivel i8.-

The draw-bar screw 25 of the lathe It in such a manner that reason it is not thought necessary to'further describe a specific interconnection.

When the taper cutting device is placed in operation the carriage 28 upon the lathe ll willv be moving longitudinally along the ways Ila carrying the carriage bracket 25 and the shoev 88 therewith. The slide 48 and the swivel I8 will be retained in a stationary position with respect to the lathe, the anchor bracket 42 and the rod 4|. Relative movement of these parts will cause the shoe 88 to follow an angular path of longitudinal travel upon the 'guideway 8| of the swivel 58. Since the shoe 88 is connected to the cross-feed screw 25 or the cross-slide 28 by means of the draw-bar 64, it is seen that the angular path of travel of the shoe 8] will be directly transmitted to a tool positioned within the tool post mounted upon the cross-slide 28.

To permit this transverse movement ofthe..-

cross-slide 28 without rotation of the cross-feed screw 25 any conventional telscopic driving attachment between the cross-feed screw 25 and the lathe feed mechanism forthe cross-feed screw may be provided. Since such arrangements are conventional further description and disclosure thereof is not believed necessary.

The taper cutting device of this-invention consists of the carriage bracket 85 having upward- 1y extending longitudinally positioned, walls 18 and II. The walls 18 and 1| are interconnected by means of a substantially horizontal platform 12 which provides an upper recess I8 which extends longitudinally between the walls 18 and II. Below the platform I2 there are provided cored passages 14 and 15. Upon the upper side of the platform 12 and adjacent the walls 18 and H upwardly extending runways I8 and 11 are positioned longitudinally thereupon. These runways l8 and 11 provide the roller bearing surface for anti-friction bearing devices I8 and 18, respectively.

These anti-friction bearing devices 18 and I! consist of a plurality of roller bearing elements 88 and 8|, respectively. The adjacent roller bearing elements 88 of the anti-friction bearing device 18 are connected by means of links 82,

through which a reduced diameter portion 88 of the roller bearing elements 88 extends. The

interconnection of the roller bearingelements 88 by means of the links 82 provides a continuous chain of lineally interconnected roller bear-' ing members which'may extend longitudinally along the runway I8 positioned upon the platform 12 of the carriage bracket 35. Pulley 84 is pivotally mounted upon bearings 85 over which the continuous chain of anti-friction roller bearing elements extend. One of these pulleys 84 is mounted adjacent each. end of the runway I8 and provides means for tensioning the continu- 84 is attached to the cross-feed the shoe to to provide a substantially frlctlonf the shoe II and the V links 82 and 85 are 01' greater dimensional width than the diameter of the roller bearings 90 and- UI, respectively, whereby the inner edges of the 1 links l2-and 86 'will cooperate with the runways I6 and TI to provide means to guide the antifriction bearing chains I8 and I9 longitudinally along the runways I6 and H.

The slide III is positioned within the recess II provided between walls III and II of the carless movement between swivel guideway I. I

The draw-bar II is slidingly mounted within the brackets m and m which extend upwardly from the carriage bracket 35, and are provided with a channel shaped recess in which the drawbar 64 may operate transversely to the carriage bracket 35. A cover plate H4 is positioned adlament the draw-bar N and is secured to' the brackets H2 and Ill by means of the bolts Ill;

the cover plate III providing a closed recess within which the draw-bar 24 -may slide.

To provide added insurance that theslide ll will not lift vertical from the anti-friction roller bearing chains II and I9, I provide horizontally positioned gibs iii which extend over opposite parallel edges of the slide 49.

riage bracket 35 and is provided with downwardly extending runways QII and 9! which rest upon the anti-friction roller bearing chains I8. and I9, respectively, whereby the roller hearing chains receive the vertical thrust of the slide ll. The interconnectinglinks 82 and 86 of the anti-friction roller bearing chains I8 and 19 are also adapted to engage the walls of the runways 99 and 9!, whereby the chains 18 and I9 are also guided in their longitudinal movement with respect to the runways 90 and 9| 7 in the same manner as with respect to runways I5 and TI.

The slide 40 is provided with a guideway 92 which extends downwardly from the bottom surface of the slide 49 and is in parallel'relation with the runways 99 and-9i of the slide and with the runways I5 and 11 of the carriage bracket 35. A plurality of anti-friction bearing devices 95, each consisting of a multiplicity of rotary bearing elements, are mounted upon an insert or gib 96 and are arranged adjacent a vertical wall 9170f the guideway 92. A similar set of anti-friction bearing elements 99, each consisting of a multiplicity of rotary bearing elements, is mounted uponthe gib 99 and is positioned adjacentthe vertical wall III of the guideway 92. The gibs 98 and 99 are mounted within suitable recesses in the platform I2, the gib 99 being secured by means of bolts IOI while the gib 96 is adjustably positioned within the recess I 92 by means of adjusting screws I03 and I positioned at opposite ends of the gib 96, and which are in threaded engagement with the platform 12. The gib 96 is provided with a ta. pered wall which cooperates with 9, correspondingly tapered wall of the platform 12' as at I05,

In Figure 4, I have shown a modiiied arrangement or the positioning of. the anti-friction hearing devices between the longitudinal guideway of the slide and the bearing mountings upon the carriage bracket. In Figure 4, there is shown an inversion oi the bearing mountings wherein anti-friction bearing devices I29 and I2! are supported upon gibs I22 and I23, respectively. The gibs I22 and I22 are mounted within suitable recesses and I25 positioned within the slide 49, whereby the anti-friction bearing devices I 28 and I2! are mounted upon the slide 49 rather than upon the carriage bracket as disclosed in Figure 2 Aguideway I2! extends up- -wardly from the platform I2 0! the carriage whereby adjustment of the screws I03 and I 04 will cause the gib to move transversely upon the platform 12 to adjust the working clearance between the anti-friction 'bearing devices 9.5 and 98 and the guideway 92'. These anti-friction bearing devices 95 arid 99 are mounted with their rotational axes in a vertical position whereby the bearing faces cooperate with the vertical walls 91 and III. of the guideway 92 to absorb the transverse thrust oi the slide 40 when operated. with respect to the carriage bracket 25.

The swivel 59, as has heretofore been de- I scribed, is pivotally mounted upon the slide 40 by means of the pin 5|. The swivel 59 has the upwardly extending guideway 5| which cooperates with a plurality of anti-friction bearing devices I II, each of which consists of a multiplicity of rotary bearing elements, mounted upon bracket 35, the anti-friction bearings I" and HI being adjacent to and cooperating therewithto guide the slide ll longitudinally oi the carriage bracket 35. The gib I22 may be adjustable in the same manner as the gib 98 of Figure 2.

In this figure I have also shown a modified arrangement otthe anti-friction bearing device between the shoe 69a and the swivel Ila wherein the swivel 59a consists 01' a member substantially channel shaped in cross-section. The shoe 60a is adapted to be positioned within the re-. cess portion of the shoe 59a and the anti-friction bearing devices I", each consisting or a multiplicity oi rotary bearing elements, being adapted to cooperate with the vertically extending walls of the channel shaped swivel Ila.

While the form of the invention as. disclosed in this application shows a preferred form of the invention, yet it is desired to cover all modifications which fall within the scope of the claims. I

Having thus fully described my invention, hat I' claim as new and desire to secure by Letters Patent is:

'1. Ina machine tool, a carriage bracket platform, a slide member movable with mpect to said platform member, a longitudinally positioned guideway extending from one of said members, a plurality of ball bearing anti-friction devices positioned upon the other of said members and disposed on the opposite sides of said guideway to longitudinally uide said slide with respect to said platform, a longitudinally tapered recess in said other of said members,-

a longitudinally tapered wedge disposed in said recess and supporting said anti-friction devices I on one sideot said guideway, means for moving said wedge longitudinally in said recess to transversely move said anti-friction devices with respect to said guideway to adjust the clearance therebetween, and a. continuous chain oi'roller bearing elements longitudinally encircling said for a machine-tool having a bracket member and a slide member relatively movable to each other, hearing means between adjacent faces of said members, a guideway in one of said membets, a tapered recess in the other of said members, a wedge disposed in said recess, means for -moving said wedzealong said recess to trans versely move said bearing means with respect to said guideway whereby to adjust the clearance between said members.

CLIFFORD A. mm 

